Improvement in steam-geneeatobs



I JONATHAN AMORY, 0F WEST ROXBURY, MASSACHUSETTS.

LetteraPatent No. 80,265, dated ulg/ 28, 1868.

IMPROVEMENT IN STEAM-GENERATORS.

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TO ALL WHOM IT MAY CONCERN Be it known that I, JONATHAN AMOBY, of West Roxbury, in the county of Norfolk, and State of Massachusetts, have invented certain Improvements in Boilers for Locomotives, and otherrpurposes; Vand I do hereby declare that the following is a full, clear, and exact description of the same, taken in connection with the accom` panying drawings, making a part of this specification, in which- Figure 1 is a vertical sectional elevation of a locomotive-boiler, with my improvement applied thereto, and- Figure 2 is a transversed section of the same, through tbe {ire-box.

The subject-matter of my invention relates tothe construction and application to a boiler of certain devices to enable it to produce a more lperfect and economical combustion of the fuel, which devices are especially applicable to locomotive-boilers. i

My invention consists, in the first place, in the employment, in the fire-box of a boiler, of a hollow curved heating-chamber, technically called a curve, which extends across the fire-box, and forms a curved bridge in the same, and a means for supplying hot air to the combustible gases that arise fromV the fuel, andissimilar in purpose to the curves used in boilers, as heretofore patented by me. This curved chamber is'so constructed as to introduce and mix with the said gases the amount of hot air that is necessaryto complete the combustion,

as will be more fully described.

My invention consists, in the second place, in the employment, upon the front end of a locomotive-boiler,

of a conical chamber, from which the air is taken which supplies the curve, by which means the supply of air to the curves can be better regulated, and is less disturbed by the action of the wind, and the resistance of the air to the locomotive is diminished when running at a high velocty.

4In the drawings, A is the boiler, B the lire-box, C the grate, D the door, E the tubes,` F the smoke-box, and Gr the smoke-pipe, all constructed'in the nsualrmanner. 'H is a hollow curved chamber, made of thin metal, which extends across the tire-box, nearly filling the entire width, and called thc curve.

l It is plaeedjust in front of the tubes, as shown, leaving only a space suicient to afford a proper passage for the products of combustion into the tubes E. l y

The space between the bottom of the curve and the tube-sheet is closed by the plate' J, by which all the Vproducts ot' combustion are compelled to pass up in front of the curve, and directed toward the opposite side of the hre-box. t

That side of the curve toward the fire is pierced with numerous small holes, a a, 85e., .from which the hot air from the interior oi' the curve is discharged in fine streams among the products of combustion, as they rise from the fuel and pass by its surface. The gases, by their convolntions and reverberations against the sides ofthe {ire-bex, and also in passing over the top of the curve into the space between the curve andthe tube-sheet, areintimately mixed, and their combustion is thoroughly completed before they reach the tubes, even when bituminous fuel is used. Y The curve is supplied with air by the pipes I, which lead from its interior through the boiler-tubes to the front of the boiler', as shown. V

The air, in addition to its beingr heated in the curves, also serves a very important purpose in carrying away the beat from them andpre'serving them from rapid destruction by thc intense heat in the lire-box. In order to consume the-fuel to the best advantage, it is necessary to regulate the quantity of air to be introduced through the curve, as, if'more isintroduced than is necessary to complete the combustion, the furnace will be Ain a measure cooled. If the size ofthe passage through the pipes I is properly adjusted in a locomotive-boiler for calm weather, and the engine is then run against a. hea'd -wind, tbe amount of air thrown into the {ire-box through the curve will be too great for the best effect, and to prevent this I apply to the forward end of the boiler a conical air-case, K, from the interior of which the air-pipes I lead, the inlets to which case are so arranged that the supply of air will be but little disturbed by the action of the wind in any direction. I propose to place the inlet at b, at theapex of the cone, but small holes in other positions may be usedinstcad of this, or in connection with it, as may be'desircd.

Thecone also serves to reduce the resistance of the air when the engine is running at a .high velocity; Abut the useful result of usingthe curve wthinthe {irc-box willy bey attainedwbether the conical chamber K is used or not.

What I claim '1s my invention, and desireto secure by Letters Patent, is-

'Y 1. The combination of the hee'tingcu'rvea-ndits pipe' or ,.-pipes for receiving air, with the fire-boxof the boiler, arranged and operating substantially es described.- n 2. The combination of the heating-curve and its pipe or pipes for receiving nir, with an air-chamber, K, arranged and operating,` substantially as described. i f u Executed, May 8, 1868.

JONATHAN AMORY.

Witnesses:

N. C LOMBARD, DAVID Prime 

